<style>
    .grid-container {
      display: grid;
      grid-template-columns: auto auto auto;
      background-color: #2196F3;
      padding: 10px;
    }
    .grid-item {
      background-color: rgba(255, 255, 255, 0.8);
      border: 1px solid rgba(0, 0, 0, 0.8);
      padding: 20px;
      font-size: 30px;
      text-align: center;
    }
    </style>
    </head>
    <body>
    
    <div class="grid-container">
      <div class="grid-item">1</div>
      <div class="grid-item">2</div>
      <div class="grid-item">3</div>  
      <div class="grid-item">4</div>
      <div class="grid-item">5</div>
      <div class="grid-item">6</div>  
      <div class="grid-item">7</div>
      <div class="grid-item">8</div>
      <div class="grid-item">9</div>  
    </div>
    